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No. 624,002. Patented May 2, I899. F. W. ENSIGN.

AIR FOBGING 0R COMPRESSING DEVICE.

(Application filed Feb. 2, 1898.)

(No Model.)

m: Means PETERS co, PHDTOLITHQ. WASHINGTON. n. c.

ilNiTnn STATES Trice,

PATENT FRED W. ENSIGN, OF CHICAGO, ILLINOIS, ASSIGNOR TO ALFRED J.COHEN,

' OF SAME PLACE.

AIR FORCING OR COMPRESSING DEVICE.

SPECIFICATION forming part of Letters Patent No. 624,002, dated May 2,1899.

Application filed February 2, 1898. Serial No. 668,793. (No model.)

To aZZ whom it may concern.-

Be it known that I, FRED W. EN SIGN, a citizen of the United States,residing at Chicago, county of Cook and State of Illinois, have inventedcertain new and useful Improvements in Air Forcing or CompressingDevices, of which the following is a full, clear, and exactspecification.

My invention relates to devices for comto pressing or forcing airgenerally; but it has more special reference to that class of devices inwhich the air is forced or compressed by the opening and closing actionof a door.

My invention has for its primary object to provide an improved andsimple form of airforcing device of this character adapted to be securedto a door of either the swinging or the one-way type, and will permitthe door to freely open and close any desired extent without danger ofinjury to the apparatus.

WVith these ends in view my invention con-' sists in certain features ofnovelty in the construction, combination, and arrangement of parts bywhich the said objects and certain other objects hereinafter appearingare attained, all as fully described with reference to the accompanyingdrawings, and more particularly pointed out in the claims.

In the said drawings, Figure 1 is a side ele- 3o vation of my improvedair-forcing apparatus or device applied to a door and its jamb or frame,the door being the one-waytype or kind which opens in one directiononly. Fig. 2 is a plan section thereof, showing the door open in dottedlines. Fig. 3 is a view similar to Fig. 1, illustrating a slightmodification of my invention as applied to a swing-door; and Fig. 4 is aplan section thereof.

Referring now more particularly to the form 0 of invention shown inFigs. 1 and 2, 1 represents the door, and 2 its jamb or frame, while 3is a pump cylinder or chamber containing a piston or plunger 4, thecylinder and the plunger having operative connection the one with thedoor-frame and the other with the door. The pump constituted by thecylinder 3 and plunger 4 may be constructed on the principle of anyordinary bicycle-pump in which the plunger-packing is a cup-leatheradapted to pack the plunger when moving in one direction or inwardly andto permit it to work freely when moving in the other direction of pumpthat will force air will serve the purpose. I have shown the cylinder 3connected to and supported upon the frame 2. This may be convenientlyeffected by providing the rear end of the cylinder with a pair ofperforated ears 5, which, together with a pivot-pin 6 and a pair ofperforated lugs '7, provide the cylinder 3 with hinge-support upon abracket 8, secu red in any suitable way to the jamb or frame 2.

The piston or plunger 4 has operative connection with the door 1, sothat when the door is swung upon its hinges, preferably when it closes,the plunger or piston will be forced into the cylinder and compress theair therein, forcing the air through a flexible connection or tube 9,communicating with the end of the cylinder at one end and having itsother end attached to a pipe or tube 10, which may convey the air to anydesired point of consumption, such as an atomizer, motor, or any otherdevice where air under pressure is needed. In effecting this operativeconnection with the door I provide the piston 4 with a hollow piston-rod11, having at its outer end a flange or head 12, between which and thecap 13 of the cylinder is located a coil-spring 14, which when pressureupon the piston-rod 11 is relieved forces the piston or plungeroutwardly, so as to transfer the airin the cylinder to the inner side ofthe plunger or piston, the cylinder being replenished through theinduction port 15. The mechanism is designed to cause this to take placewhen the door is opened, as shown in dotted lines in Fig. 2. As the dooris closed a bracket 16, secured to the door, forces the piston-rodinwardly. Pivot-ally secured to the upper end of this bracket 16 is arod 17, which is inserted within the hollow piston-rod 11, as clearlyindicated in Figs. 1 and 2. When the door is opened, the spring 14 willcause the flange 12 5 and rod 11 to follow up the head 18 until theplunger reaches the outer extremity of its stroke, whereupon the outwardmovement of the rod 11 ceases; but the internal rod continues to followthe door and bracket 16 while supporting and guiding the hollow rod 11,thus permitting the door to be opened to any desired extent withoutregard to the air-forcing apparatus and without danger of damagin g theapparatus or placing the parts thereof in an inoperative condition.

The form of my invention shown in Figs. 3 and 4 embodies a slightmodification, adapting it for use on a swinging door 1. In the majorityof instances doors of this character are hung in the frame at aconsiderable distance from the top, thus leaving a space, as shown inthe drawings, in which I locate my air-forcing device, the cylinder 3being pivoted to a bracket 8 on the under side of the upper member ofthe frame, so that the cylinder mayswing back and forth through thedoorway as the door swings from side to side. To one of the sides of thejamb is secured a bracket 16, in which is pivoted a double arm, one ofwhose members 18 is pivotally connected to the internal member 17 of thetelescopic piston-rod, while the other arm member 19 is connected by achain or other suitable attachment 20 to the door 1. The relation andproportions of the arm member 18, rod 11, and cylinder are such thatwhen the arm member 18 and piston-rod 11 are in direct line the pistonor plunger at will be at the inner extremity of its stroke, causing theair to be compressed or forced out of the cylinder; but as soon as thearm member 18 and rod 11 are deflected to one side of such direct linethe spring 11 will force the arm and rod 11 into the angular relationillustrated in Fig. i, drawing the plunger or piston partly or wholly tothe outer end of its stroke. \Vhen the parts are in this relation,compression of the air in the cylinder 3 is effected, as beforedescribed, when the door is opened in the direction indicated by thearrow in Fig. 4, the movement of the doorin that direction beingimparted to the arm 1n ember 18 by means of a chain 20, thus pulling thearm member 18 and piston-rod 11 to the other side of the center ordirect line and affording opportunity for the spring l-i to continue themovement in that direction and place the parts in the angular positionillustrated in Fig. 4, but on the opposite side of the door. Now if thedoor he opened in the reverse direction the operation will be repeated,as will be understood. To accomplish these movements, the combinedlength of the arm 18 and the piston-rod member 11 is greater than thedistance between the pivot of the arm 18 and the outer extremity of thestroke of the piston, but not greater than the distance between suchpivot and the inner extremity of such stroke, so that the arm 18 mayswing to either side of a straight line between the pivot of thecylinder and the pivotal support 16".

Having thus described my invention, what I claim as new therein, anddesire to secure by Letters Patent, is-

1. A device for the purpose described having in combination a cylindercontaining a plunger or piston, a hollow rod secured to said piston, andhaving the flange 12, a spring sleeved on said rod between said flangeand cylinder, a second rod working loosely in said first rod, and havingan abutment adapted to come against one end of said first rod and forceit into said cylinder against the inertia of said spring, and means forattaching the outer end of said second rod to a door, substantially asset forth.

2. A device for the purpose described having in combination a cylinderpivotally supported at one end, a piston in said cylinder, a piston-rodsecured to said piston, a spring forcing said piston-rod outwardly, apivotal arm having operative relation to said pistonrod, and means forconnecting said arm with a swinging object, the combined length-of saidarm and piston-rod being greater than the distance between the saidpivotal support of said arm and the outer extremity of the stroke of thepiston but less than the distance between such support and the inner endof the stroke of the piston whereby said arm may swing to both sides ofa straight line passing between the pivot thereof and the pivot of thecylinder, substantially as set forth.

3. A device for the purpose described having in combination anair-compressing chamber or cylinder, a plunger or piston therein, atelescopic piston-rod having one member connected to said piston, meansfor forcing said member in one direction, and means for attaching theother member of said rod and the said cylinder or chamber, the one to afixed support and the other to a door, both members of said rod beingdisconnected with and movable independently of said chamber or cylinder,substantially as set forth.

4. A device for the purpose described having in combination a cylinder,a piston therein, a telescopic piston-rod both of whose members projectfrom the same end of the cylinder and one of which is connected withsaid piston but both movable independently of the cylinder, a springacting to protrude the first said member of said rod from the cylinderand means for pivotally attaching said other member and cylinder the oneto a fixed support and the other to a door, substantially as set forth.

5. A device for the purpose described having acylinder provided with apivotal support, a piston in said cylinder, a piston-rod secured to saidpiston, a pivotal arm having one end pivoted to said piston-rod, meansfor normally protruding said rod from said cylinder and holding the sameat an angle to said arm in combination with a door-frame, atwo-way-opening door hinged in said frame with a space between its edgeand said frame, means for mounting said pivotal support of the cylinderin said space and means for mounting said pivotal arm in said space andoperatively connecting said arm to said door, substantially as setforth.

F. \V. ENSIGN.

I Witnesses:

F. A. HOPKINS, EDNA B. JOHNSON.

IIO

